- Model KDA-R/KDS-R - Doppler Pipe Flow Sensor



Ultrasonic sensors for flow measurement in slight to heavily polluted media. Designed for fastening in pipes using a nozzle.

  • Latest fourth-generation intelligent Doppler technology
  • Cost-effective pricing
  • Suitable for all channel cross sections
  • Easy to install without the need for additional constructions
  • Cables can be extended without any problems
  • Measurement in heavily polluted and abrasive media

KDA flow velocity sensors are suitable for continuous measurement of slight to heavily polluted media. The pipe sensors are designed for installation in pipes from the outside using a nozzle. Combined with transmitter types such as PCM F and without OCM F the result is a complete flow measurement system.

Typical applications for KDA pipe sensors

  • Wastewater treatment plants: intake, discharge, activated sludge tank intakes, return sludge, recirculation, surplus sludge, digester discharge and flocculant dosage
  • Permanent measurements on stormwater treatment facilities such as stormwater overflow tanks, rainwater sedimentation and retention tanks
  • Direct discharge control, infiltration (extraneous water) or leakage detection
  • Industrial wastewater networks
  • and many more


  • Measurement principle:
    • Doppler (flow velocity)
    • Piezo-resistant pressure measurement (level measurement)
  • Sensor types: v-sensor with T-compensation
  • Protection: IP 68
  • Ex-Approval:
    • II 2 G Ex ib IIB T4 (ATEX)
    • Ex ib IIB T4 gb (IECEX)
  • Operating temperature:
    • -20 °C to +50 °C
    • -20 °C to +40 °C if using the sensors in Ex Zone 1
  • Storage temperature: -30 °C to +70 °C
  • Operating pressure: max. 4 bar
  • Cable lengths: 10/15/20/30/50/100 m pre-configured, can be extended upon request
  • Cable types: LiYC11Y 2 x 1,5 + 1 x 2 x 0,34
  • Outside cable diameter: 8,4 mm ±0,25 mm
  • Sensor connection: Cable end pre-configured for connection to OCM F / FR, cable type 'K'
  • Medium-contacting materials: Stainless steel 1.4571 (pipe sensor shell); Polyurethane (cable sheath, screw joint and pipe sensor head)

Flow velocity measurement

  • Measurement range: -600 cm/s to +600 cm/s
  • Measurement uncertainty: ±1 % of measurement range end value
  • Zero point drift: absolutely stable zero point
  • Beam angle: ±5 degrees

Temperature measurement

  • Measurement range: -20 °C to +60 °C
  • Measurement uncertainty: ±0.5 K

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